Lock set



FIG. 1 is a front view of an exterior portion of the lock set of our design;

FIG. 2 is a side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a rear view of an interior portion thereof;

FIG. 6 is a side view thereof; and,

FIG. 7 is a top view thereof.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the lock set that form no part of the claimed design. 

CLAIM The ornamental design for a lock set, as shown and described. 